James roche



J. RocH-B.

PUSH PIN COMBINATION LOCK. APPLICATION FILED JUNE 4, 1908.

Patented Apr. 13, 1909.-

2 SHEETS-SHEET 1.

J. ROCHE, PUSH PIN COMBINATION LOOK.

v AP?LIO.ATION FILED JUNE 4, 190B 91 8 ,200, Patented Apr. 13, 1909.

2 SHEETS-SHEET 2 n-n: Roma's PETERS cc.. vusuuvarom u. c

UNITED STATES PATENT OFFICE.

JAMES ROCHE, OF TERRYVILLE, CONNECTICUT, ASSIGNOR TO EAGLE LOCK 00., OF TERRYVILLE, CONNECTICUT, A CORPORATION.

PUSH-PIN COMBINATION-LOCK.

T 0 all whom it may concern:

Be it known that I, JAMEs ROCHE, a citi- Zen of the United States, residing at Terryville, in the county of Litchfield and State of Connecticut, have invented a new and useful Improvement in Push Pin Combination- Locks; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specifcation, and represent, in

Figure 1 a view in front elevation of a push-pin combination lock constructed in accordance with my invention and applied to the door of a post-office lock-boX. Fig. 2 a view in rear elevation of the upper por tion of the door showing the lock and its bolt, a portion of the tumbler-case of the lock being broken away. Fig. 3 a view in horizontal section through the lock, the door and the frame in which the latter is hinged. Fig. 4 a view in inside elevation of the upper end of the door showing the look from which the tumbler-case and its cover have been removed and with the locking-disk partly broken away. Fig. 5 a detached view of the locking-disk. Fig. 6 acorresponding view of the bolt. Fig. 7 a detached view of the tumbler-case in outside elevation. Fig. 8 a corresponding inside view thereof. Fig. 9 a detached view of the justifying disk. Fig. 10 a detached view on an enlarged scale of one of the tumblers.

My invention relates to an improvement in push-pin combination locks, the object being to produce at a comparatively low cost for manufacture a simple and effective pushpin combination lock having a high degree of security and offering a wide range of per mutation.

With these ends in view my invention consists in a lock having certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claims.

In carrying out my invention as herein shown, I employ a rotatable and longitudinally movable knob 2 having a shank 3 and located in the center of a circular group of Specification of Letters Patent.

Application filed .Tune 4, 1908.

Patented April 13, 1909.

Serial No. 436,639.

ofl'lce lock boX frame 7. The outer edge of the said plate 5 is shaped to form a Series of scallops 8 arranged symmetrically with the push-buttons 4 and numbered in sequence from 1 to 12 for the guidance in the day time of the user of the lock who will be guided in the night time by the scallops which he can count by feeling without touching the pushbuttons. The said push-buttons are formed at their inner ends with conical faces 9 engaged by radial springs 10, one for each button, these springs being made from a single piece of metal and terminating at their inner ends in a ring 11 held in place by a flangedbushing 13 forming a bearing for the shank 3 of the knob 2 and located in a circular opening 14 in the door 6. The said springs 10 exert a constant effort to push the buttons 4 outward, the limit of their outward movement being determined by flanges. 15 located near their inner ends and engaging with the inner face of the door 2.

Upon the shank 3 of the knob 2 I mount a locklng-disk 16 having a D-shaped central opening 17 receiving the shank 3 which is cut away as at 18 for the purpose of being interlocked with the said disk. The said disk 16 is formed near its edge with a circular series of locking-slots 19 corresponding in number to the number of ush-buttons 4 and each consisting of a ciru ar opening and a narrow slot-like extension therefrom, whereby the said locking-slots 19 are given the form of an ordinary key-hole.

For coaction with the locking-slots 19 I employ a corresponding number of pin tumblers 20 located in line with the push buttons 4 and designed to be reversed end for end for securing different permutations. Each of these tumblers has a cylindrical body a trifle smaller in diameter than the circular ends of the locking slots 19, each is formed at one end with a concentric clearance stem 21 small enough in diameter to enter the narrow ends of the said slots 19, and each is formed at its opposite end with a circular locking-head 22 corresponding in size to the body of the tumbler but separated therefrom by an annular clearance groove 23 the formation of which produces a concentric shank 24 small enough to enter the narrow ends of the said slots. The said tumblers 20 are mounted in tumblerholes 25 in the bottom of a rectangular tumbler-case 26 attached by screws 27 to the corners of a rib-like rectangular housing; 28 cast integral with the inner face of the door 6 and inclosing' a space of sufficient depth for the springs 10 and the inner ends of the push buttons 4-. The said locking-disk 16 bears upon the outer face of the case 26 in which are mounted two stop-pins 29 entering slots 30 formed in the disk 16 for limiting the oscillating movement thereof. /l ithin the case 26 I locate a bearing disk 3]. sepi'irated from the bottom of the case by a spacing washer 32 and held in place by flanged bushing 33 which also forms a bearing for the shank 3 of the knob 2. The said. disk 31 is formed'with a series of tumbler-holes 34larranged in alinemcnt with the tumbler-holes 25 and receiving the inner ends of the tumblers as clearly shown in Fig. 3.

For insuring the restoration of the tumblers to their normal positions after their operation, I secure a justifying disk or plate 35 by a screw 36 to the extreme inner endv of the shank 3, this disk being large enough in diameter to engage with the inner ends of all of the tumblers. A. spring 37 interposed be-- tween the flanged inner ends of the bushing: 33 and the inner face of the disk 35 exerts a constant effort to draw the shank 3 and knob 2 inward and keep the inner end of the knob 2 seated within the recess 38 formed in the outer face of the door 6 within the circle of the push-buttons a.

The locking-disk 16 has formed upon. its lower edge an operating lug 39 furnished with a pin 40 for the attachment of a spring l]. the opposite end of which is attached to the pin 42 in the door 6. The'said lug 39 coacts with a shoulder 43 upon a reciprocating bolt 4d the inner end. of which is as it were, housed between the bottom of the tumbler se 26 and the lower flange 45 of the tumbler cover 46. The said bolt 44 is formed with guide slots 47 receiving guide-pins 4-8 projecting from the bottom of the said tumbler case 26. At its left hand end the cover 46 extended beyond the tumbler-case 26 for the formation of a chamber as for the reception of a bolt spring 50 coiled upon a stud 51., the lower and longer arm of the spring entering a hole 52 in theextreme inner end of the bolt the opposite end of which is provided with a beveled nose 53 for engagement with the frame 7. An arm 54. formedintegral with the bolt 4.4 and bent at a right angle to the plane thereof extends upward into the tum.- bl'er-case 26 and serves when the bolt is shot outward to engage the concentric bevel 55 of the disk 35 -which is thus automatically pressed forward. against the tension. of the spring 37, whereby the tumblers 20 are auto-- matically restored to position. The outer end of the bolt 44 is guided by a clip 56 attached by screws 57 to the inner face of the door.

With reference now to the operation of the lock, it will be understood that so many of the tumblers 20 as are arranged with their locking-heads 22 projecting forward will not interfem with the oscillation of the locking disk 16 l; an their clearance grooves 23 are registered i. h the locking-slots 19 in the said disk 16, while on the other hand so many of the tumblers 26 as are arranged '1. their clearance stems 21 fcn-ward will bloc the oscillation of the disk 16 as the then forward ends of their bodies will occupy and fill the circular ends of the slots 19. In order, therefine, to release the disk 16 for oscillation, it is necessary to push inward. so many of the push buttons 20 as are arranged. with their stems 21 forward. It is equally necessary to the oscillation of the disk 16 that none of the push buttons arranged with their locking-heads 22 forward shall be pushed ii yard, for that results in the entrance of the said lo cl ing-hcads into the circular ends of the slots 19 whereby the oscillation of the disk 16 is blocked. it is clear, therefore, that to operate the lock the user must know the nurnbers of the tumblers arranged with their clearance stems 2i. forward. with that knowlr-idge he has only to simultaneously push inward the push buttons of corresponding numbers to release the locking disk 16 for the rotation of the knob 2 and the retraction of the bolt id. Preparatory to operating the lock, the knob should be pulled outward so that the justifying disk :15 will engage with the inner ends of any of the tumblers that are not in their normally projected positions. After the lock has been operated and the knob 2 is released, the spring l1 operates to return the disk 16 to its normal position and so bring the circular ends of its slots 19 into line with the tumblers. Then as the bolt 44 is moved outward by its spring 50, the arm 541: engages with the bevel 55 of the disk 35 and by crowding the same forward insures the automatic restoration of the tumblers to their normal positions.

1. in a push-pin combination lock, the combination with a rotatable knob having" a shank, of i series of push buttons, springs for holding said push-lmttons in their normal positions, a series of tumblers arranged to coact with the pushdauttons, and a locking disk mounted upon the shank of the knob and receiving the forwa ends of the turnblers one or n'iore of winch lock the disk against rotation except as they are l'noved into their unlocked positions with respect to the disk,. by the push-buttons.

2. In a push-pin combination lock, the combination with a rotatable knob having a shank, of a series of push-buttons, springs for holding the said push-buttons in their 1101' mal positions, a series of tumblers arranged to'coact with the push-buttons, and a lock ing-disk mounted upon the shank of the knob and receiving the forward ends of the tumblers which are differentially shaped as to their ends for reversal end for end for chang ing the combination of the lock.

3. In a push-pin combination lock, the combination with a rotatable knob having a shank, of a series of push-buttons, springs for holding the same in their normal positions, a series of tumblers arranged to coact with the push-buttons, and a locking-disk mounted upon the shank of the knob and formed with a series of slots for the reception of the forward ends of the tumblers, each slot being shaped to correspond to cross-sectional differentiations in the ends of the tumblers so that the tumblers on entering the slots will either lock or clear the locking-disk.

4. In a push-pin combination lock, the combination with a rotatable knob having a shank, of series of push-buttons, springs for holding the same in their normal positions, a series of pin-tumblers arranged to coact with the push-buttons and each reduced in diameter at one end to form a clearance stem and each grooved near the other end to form a locking-head, and a clearance groove; and a locking disk. mounted upon the shank of the knob and provided with a series of key-hole slots for the reception of the tumblers which are reversible end for end. to change thecombination of the lock.

5. In a push-pin combination lock, the combination with a rotatable knob having a shank, of series of push-buttons, s rings for holding the same in their normal positions, a series of pin-tumblers arranged to coact with the push-buttons," a locking-disk mounted upon the shank of the knob and receiving the forward ends of the pin-tumblers which enter slots in the disk for locking the same, and means mounted upon the shank for engaging with the inner ends of all of the tumblers for restoring the same to their normal positions when the shank is moved longi tu linally outward.

6. In a push-pin combination lock, the combination with a rotatable knob having a shank, of a series of push-buttons, springs for holding the same in their normal positions, a series of pin-tumblers arranged to coact with the push-buttons, a locking-disk mounted upon the shank of the knob and receiving the forward ends of the pin-tumblers which enter slots in the disk for locking the same, and a disk mounted upon the shank of the knob for engagement with the inner ends of the pin-tumblers when the knob is ulled out for insuring the return. of the tumb ers to engaged by the said lug for being retracted thereb and a s rin connected with the disk for returning the same to its normal position in which it is locked by the said tumblers.

8. In a push-pin combination lock, the combination with a rotatable and longitudinally movable knob having a shank, of a series ofpush-buttons, springs therefor, a series of pin-tumblers arranged to coact with the push-buttons, a locking-disk mounted upon the shank of the knob and formed with a series of slots entered by the tumblers for locking the disk, a bolt retracted by turning the knob when the disk is unlocked by the -iovement of the selected tumblers by the push-buttons, and means operated by the bolt for automatically restoring the tumblers to their proper positions as the bolt moves into its locking position.

9. In a push-pin combination lock, the combination with a rotatable and longitudinally movable knob having a shank, of a series of push-buttons, s rings therefor, a series of tumblers arrange to coact with the push-buttons, a locking-disk mounted upon the shank of the knob and formed with a series of slots entered by the tumblers for locking the disk, a bolt retracted by turning the knob when the disk is unlocked, a disk mounted upon the shank of the knob for engagement with the inner ends of the tumblers when the knob is moved longitudinally outward, and an arm connected with the bolt and coacting with the said disk as the bolt moves into its locking position for automatieally restoring the tumblers to their proper positions.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

JAMES ROCHE. Witnesses Orrs B. HoUen, HARRY C. Crow. 

